fix: support CRLF SSE frame parsing (#223)

src/cli/transports/__tests__/SSETransport.test.ts

@@ -0,0 +1,49 @@
+import { describe, expect, test } from 'bun:test'
+import { parseSSEFrames } from '../SSETransport.js'
+
+describe('parseSSEFrames', () => {
+  test('parses LF-delimited frames', () => {
+    const input = 'event: client_event\ndata: {"ok":true}\n\n'
+    const { frames, remaining } = parseSSEFrames(input)
+
+    expect(remaining).toBe('')
+    expect(frames).toEqual([
+      {
+        event: 'client_event',
+        data: '{"ok":true}',
+      },
+    ])
+  })
+
+  test('parses CRLF-delimited frames and strips trailing carriage returns', () => {
+    const input =
+      'event: client_event\r\ndata: {"ok":true}\r\nid: 7\r\n\r\nevent: keepalive\r\ndata: ping\r\n\r\n'
+    const { frames, remaining } = parseSSEFrames(input)
+
+    expect(remaining).toBe('')
+    expect(frames).toEqual([
+      {
+        event: 'client_event',
+        data: '{"ok":true}',
+        id: '7',
+      },
+      {
+        event: 'keepalive',
+        data: 'ping',
+      },
+    ])
+  })
+
+  test('keeps incomplete trailing frame in remaining buffer for CRLF streams', () => {
+    const input = 'event: client_event\r\ndata: {"ok":true}\r\n\r\ndata: {"tail":1}\r\n'
+    const { frames, remaining } = parseSSEFrames(input)
+
+    expect(frames).toEqual([
+      {
+        event: 'client_event',
+        data: '{"ok":true}',
+      },
+    ])
+    expect(remaining).toBe('data: {"tail":1}\r\n')
+  })
+})